<template>
  <el-container class="home">
    <!--头部区域-->
    <el-header>
      <div class="top">
        <img src="../assets/touxiang.jpg" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button></el-header
    >
    <!--页面主体区域-->
    <el-container>
      <!--侧边栏区域-->
      <el-aside :width="iscollapse?'64px':'200px'">
        <!--侧边栏菜单区域-->
        <div class="toggle-button" @click='toggleCollp'>|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          :unique-opened ="true"
          :collapse="iscollapse"
          :collapse-transition="false"
          :router = 'true'
          :default-active="activePath"
        >
          <!--一级菜单区域-->
          <el-submenu :index="item.id + '' " v-for='item in menulist' :key="item.id">
            <!--一级菜单模板区域-->
            <template slot="title">
              <!--图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--文本-->
              <span>{{item.authName}}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item 
            :index="'/'+subItem.path" 
            v-for='subItem in item.children' 
            :key="subItem.id" 
            @click="saveNavStatus('/'+subItem.path)"
            >
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右侧内容区域-->
      <el-main>
           <!--路由占位符主体区域-->
           <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
    return{
      menulist:[],
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao',
      },
      // 是否折叠
      iscollapse:false,
      // 被激活的链接地址
      activePath:'',
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem("activePath")
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      // console.log(res)
    },
    // 点击按钮，切换菜单的折叠与张开
    toggleCollp(){
      this.iscollapse = !this.iscollapse
    },
    // 保存连接的状态
    saveNavStatus(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
}
</script>
<style lang="less" scoped>
.home {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  .top {
    display: flex;
    align-items: center;
    span {
      margin-left: 10px;
    }
    img {
      width: 40px;
      height: 40px;
      margin: 5px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right:none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right:15px;
}
.toggle-button{
  background-color:#4A5064;
  font-size:10px;
  line-height:24px;
  color:#fff;
  text-align:center;
  letter-spacing:0.2em;
  cursor:pointer;
}
</style>
